The program defines a signal handler that calls a non-reentrant
					function.Non-reentrant functions are functions that cannot safely be called,
						interrupted, and then recalled before the first call has finished without
						resulting in memory corruption. This can lead to an unexpected system state
						an unpredictable results with a variety of potential consequences depending
						on context, including denial of service and code execution.Many functions are not reentrant, but some of them can result in the
						corruption of memory if they are used in a signal handler. The function call
						syslog() is an example of this. In order to perform its functionality, it
						allocates a small amount of memory as "scratch space." If syslog() is
						suspended by a signal call and the signal handler calls syslog(), the memory
						used by both of these functions enters an undefined, and possibly,
						exploitable state. Implementations of malloc() and free() manage metadata in
						global structures in order to track which memory is allocated versus which
						memory is available, but they are non-reentrant. Simultaneous calls to these
						functions can cause corruption of the metadata.